diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.h | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.h b/drivers/gpu/drm/i915/intel_display.h index 43eb4ebbcc35..5f2955b944da 100644 --- a/drivers/gpu/drm/i915/intel_display.h +++ b/drivers/gpu/drm/i915/intel_display.h @@ -43,6 +43,11 @@ enum i915_gpio { GPIOM, }; +/* + * Keep the pipe enum values fixed: the code assumes that PIPE_A=0, the + * rest have consecutive values and match the enum values of transcoders + * with a 1:1 transcoder -> pipe mapping. + */ enum pipe { INVALID_PIPE = -1, @@ -57,9 +62,20 @@ enum pipe { #define pipe_name(p) ((p) + 'A') enum transcoder { - TRANSCODER_A = 0, - TRANSCODER_B, - TRANSCODER_C, + /* + * The following transcoders have a 1:1 transcoder -> pipe mapping, + * keep their values fixed: the code assumes that TRANSCODER_A=0, the + * rest have consecutive values and match the enum values of the pipes + * they map to. + */ + TRANSCODER_A = PIPE_A, + TRANSCODER_B = PIPE_B, + TRANSCODER_C = PIPE_C, + + /* + * The following transcoders can map to any pipe, their enum value + * doesn't need to stay fixed. + */ TRANSCODER_EDP, TRANSCODER_DSI_0, TRANSCODER_DSI_1, |